I'm looking for info on the Fuba Antenna (Short Mast/Amplified, stamped with adjustments for Audi 80 and 200) on my '88 5ksq. I have crummy reception (not the head unit's fault, and all the grounds seem good), and I was wondering if it could be the antenna's amplifier (or some internal ground?)? Finally, any cheap replacement ideas (regular length mast and no amp)? Thanks, Matt.